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53-attosecond X-ray pulses reach the carbon K-edge.

ABSTRACT: The motion of electrons in the microcosm occurs on a time scale set by the atomic unit of time-24 attoseconds. Attosecond pulses at photon energies corresponding to the fundamental absorption edges of matter, which lie in the soft X-ray regime above 200?eV, permit the probing of electronic excitation, chemical state, and atomic structure. Here we demonstrate a soft X-ray pulse duration of 53 as and single pulse streaking reaching the carbon K-absorption edge (284?eV) by utilizing intense two-cycle driving pulses near 1.8-?m center wavelength. Such pulses permit studies of electron dynamics in live biological samples and next-generation electronic materials such as diamond.Isolated attosecond pulses are produced using high harmonic generation and sources of these pulses often suffer from low photon flux in soft X-ray regime. Here the authors demonstrate efficient generation and characterization of 53 as pulses with photon energy near the water window.

SUBMITTER: Li J

PROVIDER: S-EPMC5543167 | biostudies-literature | 2017 Aug

REPOSITORIES: biostudies-literature

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53-attosecond X-ray pulses reach the carbon K-edge.

Li Jie J Ren Xiaoming X Yin Yanchun Y Zhao Kun K Chew Andrew A Cheng Yan Y Cunningham Eric E Wang Yang Y Hu Shuyuan S Wu Yi Y Chini Michael M Chang Zenghu Z

Nature communications 20170804 1

The motion of electrons in the microcosm occurs on a time scale set by the atomic unit of time-24 attoseconds. Attosecond pulses at photon energies corresponding to the fundamental absorption edges of matter, which lie in the soft X-ray regime above 200 eV, permit the probing of electronic excitation, chemical state, and atomic structure. Here we demonstrate a soft X-ray pulse duration of 53 as and single pulse streaking reaching the carbon K-absorption edge (284 eV) by utilizing intense two-cyc ...[more]

PMID: 28775272

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